Katy Perry says that once she has finished promotion for her new 3D documentary, Katy Perry: Part of Me, she wants to "go into a cave."

The 27-year-old singer is still reeling from her split with British actor Russell Brand.

And she tells Us Weekly that after a heartbreaking and stressful year she's ready to disappear for a while.

"I think I'm going to go into a cave after this," she told the publication. "It might be appropriate. I would like to be in a beautiful unplugged place where there's not a lot going on so I can get back into and hopefully write some good songs."

"Just take these damn extensions out of my hair and fill my head again! Although I will look like a complete freak."

Katy says some of the scenes in the movie are "super sensitive and very emotional."

"It's not always very fun, but it's important sometimes to show that real people sometimes have to go through things like this in order to achieve things, because nothing great comes so easily.